phosphorescence
noun
phos·pho·res·cence
ˌfäs-fə-ˈre-sᵊn(t)s
1
: luminescence that is caused by the absorption of radiations (such as light or electrons) and continues for a noticeable time after these radiations have stopped compare fluorescence
2
: an enduring luminescence without sensible heat
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Merriam-Webster unabridged
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